Dr. Smith is interested in how separation anxiety changes over time from childhood to adolescence in the general population. What is his main field of study?

Research guidelines from the National Institutes of Health have emphasized the importance of including ________ in clinical research

A) balanced conditions B) diverse participants C) older cohorts D) large groups

Which of the following is correct about interpreting the results of statistical tests?

A. Obtaining a probability value of .05 tells us the difference between groups is definitely not caused by chance fluctuation. B. If a probability value falls above .05, then the results will have to be replicated before we can have confidence in them. C. Obtaining a probability value of .05 gives us confidence that the findings are not the result of chance, but does not eliminate this possibility. D. A .05 probability value means there is a 5 percent chance the finding reflects a real difference.